People used to send letters to communicate, but now we use_______
cell-phones
We used to wash clothes with our hands before we had _______
washing machines
I don't know what people used to do before we had ______ to keep food cold.
refrigerators
People used to use candles to light up rooms before the invention of the _____
Flashlight
People still use ____ to cook today!
stoves
Before I had a kindle, I used to read ______ books.
printed
